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Model a cup of coffee as a closed system containing 1 lbm of pure water at constant pressure of 14.7 psia. Using your knowledge of the 2nd Law, prove that it would be impossible for coffee at room temperature of 70 °F to heat up to 120 °F by receiving heat from the surroundings at 70 °F . Your proof should include all necessary thermodynamic calculations.
a particle moves in the x-y plane such that its postion is defined by r2ti4t2jft where t is in seconds. determine the
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the structure of a house is such that it loses heat at a rate of 5400 kjh per degree celcius difference between the
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a block of mass mb 5 kg is suspended from a cable of stiffness k 300 nm. the block is acted upon by a vertical force
a flat plate solar collector 6ft by 12ft is mounted on the roof of a house. the outer surface of the collector is at
a large pipe carries steam as a two-phase liquid-vapor mixture at 1.0 mpa. a small quantity is withdrawn through a
the weather drops to 5 degrees celcius t1 so to keep warm you offer to make hot soup for the entire group. the
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10 kg of water in a piston-cylinder arrangement exists as saturated liquidvapor at 100 kpa with a quality of 50. it is
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